Add pyproject.toml (angr#3193)

pyproject.toml

@@ -0,0 +1,3 @@
+[build-system]
+requires = ["setuptools"]
+build-backend = "setuptools.build_meta"

setup.py

@@ -1,4 +1,4 @@
-# pylint: disable=no-name-in-module,import-error,unused-variable
+# pylint: disable=no-name-in-module,import-error,unused-variable,missing-class-docstring
 import os
 import sys
 import subprocess
@@ -7,37 +7,9 @@
 import platform
 import glob
 
-if bytes is str:
-    raise Exception("""
-
-=-=-=-=-=-=-=-=-=-=-=-=-=  WELCOME TO THE FUTURE!  =-=-=-=-=-=-=-=-=-=-=-=-=-=
-
-angr has transitioned to python 3. Due to the small size of the team behind it,
-we can't reasonably maintain compatibility between both python 2 and python 3.
-If you want to continue using the most recent version of angr (you definitely
-want that, trust us) you should upgrade to python 3. It's like getting your
-vaccinations. It hurts a little bit initially but in the end it's worth it.
-
-If you are staying on python 2 and would like to make sure you don't get
-incompatible versions, make sure your pip is at least version 9.0, and it will
-use our metadata to implicitly avoid them.
-
-For more information, see here: https://docs.angr.io/appendix/migration
-
-Good luck!
-""")
-
-try:
-    from setuptools import setup
-    from setuptools import find_packages
-    packages = find_packages()
-except ImportError:
-    from distutils.core import setup
-    packages = [x.strip('./').replace('/','.') for x in os.popen('find -name "__init__.py" | xargs -n1 dirname').read().strip().split('\n')]
-
-from distutils.errors import LibError
-from distutils.command.build import build as _build
-from distutils.command.clean import clean as _clean
+from setuptools import setup, find_packages, Command
+from setuptools.command.build_ext import build_ext as st_build_ext
+from setuptools.errors import LibError
 
 if sys.platform == 'darwin':
     library_file = "angr_native.dylib"
@@ -92,32 +64,28 @@ def _clean_native():
     for fname in oglob:
         os.unlink(fname)
 
-class build(_build):
+class build_ext(st_build_ext):
     def run(self, *args):
         self.execute(_build_native, (), msg='Building angr_native')
-        _build.run(self, *args)
+        super().run(*args)
+
+class clean_native(Command):
+    user_options = []
+
+    def initialize_options(self):
+        pass
+
+    def finalize_options(self):
+        pass
 
-class clean(_clean):
     def run(self, *args):
         self.execute(_clean_native, (), msg='Cleaning angr_native')
-        _clean.run(self, *args)
 
 cmdclass = {
-    'build': build,
-    'clean': clean,
+    'build_ext': build_ext,
+    'clean_native': clean_native,
 }
 
-try:
-    from setuptools.command.develop import develop as _develop
-    class develop(_develop):
-        def run(self, *args):
-            self.execute(_build_native, (), msg='Building angr_native')
-            _develop.run(self, *args)
-
-    cmdclass['develop'] = develop
-except ImportError:
-    pass
-
 _UNICORN = "unicorn==1.0.2rc4"
 
 setup(
@@ -126,7 +94,7 @@ def run(self, *args):
     python_requires='>=3.6',
     description='A multi-architecture binary analysis toolkit, with the ability to perform dynamic symbolic execution and various static analyses on binaries',
     url='https://github.com/angr/angr',
-    packages=packages,
+    packages=find_packages(),
     install_requires=[
         'sortedcontainers',
         'cachetools',